KR100588835B1 - Composition for thin stratum pavement of asphalt and thin stratum pavement method of thereof - Google Patents

Abstract

The present invention is 10 to 40 parts by weight of asphalt, 65 to 80% by weight of coarse aggregate, 10 to 40% by weight of fine aggregate, and 10 to 40 parts by weight of asphalt mixture, ethylene-based copolymer or styrene-based copolymer. 1 to 10 parts by weight of any one or more polymer modifiers selected from, 1 to 15 parts by weight of any one or more strength modifiers selected from polypropylene fibers, polyethylene fibers, cellulose fibers, glass fibers, carbon fibers, aramid fibers, ethylene and methacryl The present invention relates to an asphalt thin film pavement composition and a thin layer pavement method using the same, characterized in that 0.5 to 2 parts by weight of an ionomer containing 1 to trivalent metal salts are used as a copolymer of an acid.

Asphalt Laminate Pavement

Description

Composition for thin pavement of asphalt and asphalt pavement method using same {Composition for Thin Stratum Pavement of Asphalt and Thin Stratum Pavement Method of

The present invention increases the durability of cracks and wheel marks due to vehicle traffic in the asphalt pavement, can be easily colored to show a variety of colors, by applying directly to the surface of the existing asphalt pavement or newly paved asphalt Inexpensive construction and economical asphalt laminate pavement.

Conventionally, the pavement of roads or old asphalt, which are frequently passed by automobiles, has a significant surface damage such as wheel marks and cracks caused by the flow of asphalt, which adversely affects the safety and comfort of the driver's driving. In addition, when a crack occurs on the pavement, rainwater enters from there, and there is a problem of more severely promoting cracking of the roadbed.

Due to these problems, repair work is often performed to secure traffic safety, which prohibits traffic for a long time, which not only interferes with traffic, but also economic problems due to cutting and asphalt re-installation, and disposal of asphalt that is cut and discarded. Lee had a problem.

Therefore, the need for a thin layer pavement method to form a thin layer on the surface of the asphalt is excellent in durability, excellent adhesion with the existing asphalt pavement, beautiful surface and satisfactory economic efficiency.

The present invention has been made to solve the above problems, the object of the present invention is to wrap in a thin layer on the road surface of the existing asphalt road or newly laid asphalt, excellent adhesion to the asphalt road surface, the load of the vehicle It is to provide an asphalt thin pavement composition that can be given a variety of colors, durability and low damage to the surface due to excellent durability against the temperature change according to the season and durability.

In addition, the present invention can adjust the curing time by appropriately using the curing agent according to the season or temperature, and can add the braking force or visibility by adding waste tire powder or waste glass powder, and the time for repair and construction is shortened, so It is an object of the present invention to provide a composition for asphalt thin pavement with little damage.

In addition, the present invention is to coat the surface finish or asphalt oil paint to improve the surface strength and durability, not only to increase the bonding strength between the composition, but also easy to use a variety of colors, can be used in a variety of colors, only the thin layer is reduced cost It is an object of the present invention to provide an economical thin packaging method.

The present invention is characterized in that the road surface is prevented from being worn out by the traffic of the vehicle or the aggregate is detached, and when the asphalt is repaired, it is economical by laying it in a thin layer on the surface, and has excellent adhesiveness with the existing asphalt road surface. The present invention relates to a thin asphalt pavement composition and a thin asphalt pavement method using the same.

In addition, since the present invention is installed in a thin layer, the manufacturing cost is reduced, and if you want to install color asphalt, economical effect by forming a thin layer by mixing the pigment in the composition or packing the thin layer packaging and coating the finishing material or oil paint of various colors. Relates to a thin pavement of asphalt.

More specifically, 10 to 40 parts by weight of asphalt, ethylene copolymer or styrene air with respect to 100 parts by weight of a mixture of 65 to 80% by weight of coarse aggregate, 10 to 30% by weight of fine aggregate, and 5 to 10% by weight of filler material. 1 to 10 parts by weight of any one or more polymer modifiers selected from coalescing, 1 to 15 parts by weight of any one or more strength modifiers selected from polypropylene fibers, polyethylene fibers, cellulose fibers, glass fibers, carbon fibers, and aramid fibers, ethylene and meta The present invention relates to an asphalt thin film pavement composition and a thin layer pavement method using the same, wherein the copolymer of krylic acid is mixed with 0.5 to 2 parts by weight of an ionomer containing 1 to trivalent metal salts.

Packing method

1) compacting after laying the asphalt substrate;

2) compacting after laying the composition for thin packaging on top of the asphalt layer;

3) drying after curing;

And optionally after the step 3) 4) after finishing the coating or oil paint for asphalt or curing; It is also possible to add more.

In addition, the present invention has the effect that the composition of the present invention is more strongly attached when the resistance is given by scratching the road surface of asphalt in a conventional method in the step 2). In addition, after scraping the road surface in a conventional manner for repairing the damaged part of the road to increase the resistance, the composition of the present invention can be paved to increase the adhesive strength. In addition, in the case of applying an adhesive such as urethane-based, acrylic, epoxy-based resin on the road surface in advance, the adhesive force may be further added, but sufficient adhesive force may be given only by the composition of the present invention.

In the present invention, the finish is used to increase the surface strength, spraying in the range of less than 0.5kg per m 2, can be used by mixing a dye or pigment in the finish as necessary. In addition, it is also possible to coat the oil paint for asphalt instead of the finishing material, the oil paint may be composed of one- or two-component oil paints and solvents composed of acrylic and urethane resins, and inorganic pigments of various colors, asphalt Any oil-based paint can be used. Therefore, when the thin packaging of the present invention can be given a variety of colors and at the same time only to give a color to the thin layer there is an effect that the manufacturing cost is reduced.

When thin-layer package using the composition of the present invention dynamic stability (60 ℃) is 5000 / mm or more, a bending strength of 900 N / ㎠ or more, rupture distortion is 6 × 10 ^{- 3} or more, the displacement of up to destroy 3.9 mm Above, the breaking energy is 15.3 kN · nm or more, the indirect tensile strength (25 ℃) has the physical properties of 1500 kPa or more, and can be packed in the thickness of 0.1 ~ 2 cm.

Hereinafter, each component used for the thin packaging composition of this invention is demonstrated concretely.

In the present invention, the aggregate uses coarse aggregate and fine aggregate, and the coarse aggregate should be hard, strong, durable, free of deposits, and contain no clay or silt or other harmful substances, and comply with KS F 2357 standard. Should be. Fine aggregates refer to crushed sand obtained by breaking natural sand, rocks, gravel, etc. or mixtures thereof, and those complying with KS F 2357 standard are used.

The filling material then uses limestone powder, portland cement, slaked lime, fly ash, recovered dust, furnace steelmaking dust, foundry dust, various incineration ashes and other suitable powders of mineral material. Use the quality conforming to KS F 3501 standard.

In the present invention, the coarse aggregate is used 65 to 80% by weight, and the aggregate is used 10 to 30% by weight, the reason for using a relatively large coarse aggregate is to improve the interlocking of the aggregate. The above range is apparent in that the present inventors use the color in the best range by experiment, and can be used by the user according to the physical properties and climate of the road.

In the present invention, the asphalt refers to a black or dark brown solid or semi-solid thermoplastic material composed of thousands of high molecular hydrocarbons (CH) including an organic mixture and a small amount of inorganic compounds, and the like.Asphalt Cement Europe is commonly referred to as Bitumen. Its types include natural asphalt, such as lake asphalt, lock asphalt, sand asphalt, gilsonite asphalt, grahamite asphalt, gland pitch asphalt, straight asphalt (KS M 2201), asphalt cement (road paving asphalt). Petroleum asphalt and tar, such as cutback asphalt (KS M 2202), emulsified asphalt (KS M 2203), blown asphalt, modified asphalt, etc., which are mainly obtained from coal drying process. It is characterized by its peculiar smell and it is a black liquid. It is determined by Korean Industrial Standard KS M 2206 packaging tar. In the present invention, the asphalt is used 10 to 40 parts by weight based on 100 parts by weight of the mixture of aggregate and filler. Since the asphalt is used to give the adhesion between the aggregates, it is not necessary to use a large amount, and if it exceeds the above range, it is not preferable because the stickiness of the road surface becomes stronger after paving the asphalt.

In the present invention, the polymer modifier is used to prevent desorption of aggregates by chemically bonding the surface of the aggregate with asphalt and to increase the durability of the aggregate, and having an average molecular weight of 1,500 to 90,000 ethylene vinyl acetate (EVA ), Ethylene ethyl acrylate (EEA), ethylene methyl acrylate (EMA), any one of an ethylene-based copolymer selected from ethylene-propylene copolymer or styrene-butadiene-styrene copolymer (SBS), styrene-butadiene-rubber Any styrene-based copolymer selected from copolymer (SBR) and acrylonitrile-styrene-acrylic acid ester (ASA) is used. The styrene-butadiene-styrene copolymer preferably has a styrene content of 15 to 50 mol%, more preferably 20 to 40 mol%. The block copolymer may be linear or branched, and the number average molecular weight of the block copolymer may be used in a range of 2,000 to 900,000, preferably 15,000 to 300,000. The copolymer is a thermoplastic rubber provided in the form of pellets, flakes, powder, the product form is preferred because the powder form has a shorter dissolution time than the plaque. The content is preferably used 1 to 10 parts by weight with respect to 100 parts by weight of the mixture of the aggregate and the filler, and if it exceeds the above range, the viscosity of the composition is sharply increased, the manufacturing cost is not preferred.

In the present invention, the strength reinforcing agent is used to prevent the occurrence of cracks in the thin packaging, and may be any one or more selected from polypropylene fiber, polyethylene fiber, cellulose fiber, glass fiber, carbon fiber, aramid fiber. . The content is preferably 1 to 15 parts by weight based on 100 parts by weight of the mixture of the aggregate and the filling material, and when used in the above range, the strength of the thin layer pavement is improved, cracks are reduced, and wheel marks due to the flow of the mixture. This is suppressed.

In addition, the present invention is used to achieve the chemical bond between the aggregate and the asphalt component, the aggregate and the filler to increase the durability by increasing the binding strength of the hydrophilic additives of various additives, including lipophilic asphalt and aggregate. 0.5 to 2 parts by weight of an ionomer containing sodium or zinc metal salt of a copolymer of ethylene and methacrylic acid is used for 100 parts by weight, and the ionomer has a molecular chain of olefins such as ethylene and propylene, such as acrylic acid, meta Part of the carboxyl group of the olefin copolymer obtained by copolymerizing with acrylic acid, maleic acid, itaconic acid and the like has a basic structure bridged by metal ions, the ionomer includes those produced by copolymerization with other comonomers . Examples of the metal ion include 1 to trivalent ions such as sodium, potassium, silver, copper, calcium, barium, zinc, iron, magnesium, and the like, and in particular, the use of ionomers having a metal salt of sodium or zinc is a mechanical property. This is excellent. The ionomer is particularly preferably a copolymer of ethylene and a metal salt of methacrylic acid.

In the present invention, it is also possible to optionally add 0.1 to 3 parts by weight of an adhesive imparting agent to 100 parts by weight of the mixture of the aggregate and the filler. If it exceeds the above range, since the viscosity of the mixture rises, processing tends to be difficult, and when used at less than 0.1 part by weight, the effect is insignificant, which is not preferable. Adhesion imparting agent serves to firmly bond the composition to the road surface, for example, aromatic petroleum resin, coumarone indene resin, aliphatic petroleum resin, phenol resin, rosin, hydrogenated rosin, modified At least one selected from the group consisting of rosin, coumarone-indene resin, shellac, copal, fatty acid, polyamide resin and polyester resin is used.

The present invention can also be used by adding 1 to 5 parts by weight of the curing agent based on 100 parts by weight of the aggregate and the filler. The curing agent may be selected from styrene butadiene rubber, acrylic rubber, ethylene-vinyl acetate, chloroprene, 40 to 70% by weight of any one or more of high concentration rubber latex selected from mineral oils, animals and plants, or synthetic oils having a solid content of 40 to 70%. Any one or more ratios selected from 5 to 20% by weight of any one or more heavy oils, polyoxy ethylene nonylphenyl ether, polyoxyethylene olyl phenyl ether, polyoxyethylene cetyl ether, polyoxy ethylene lauryl ether, polyoxy ethylene stearyl ether 10 to 30 wt% of ionic surfactant, 2 to 7 wt% of at least one ion blocking agent selected from 2-methyl calcium methacrylate, ethylenediamine tetraacetic acid, ammonium glyconate, sodium trifolate, casein Water soluble silicate selected from%, liquid sodium silicate, liquid potassium silicate, liquid lithium silicate 2 ~ 5 weight% is used in mixture.

In addition, the present invention may be used by adding additional inorganic pigments as necessary to the composition, the inorganic pigments are reddish brown pigments such as iron oxide, yellow pigments such as iron hydroxide, green pigments such as chromium oxide, ultramarine blue such as sodium aluminosilicate White pigments, such as a pigment and titanium oxide, can be used conventionally used in this field. The content is used in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of the mixture of the aggregate and the filling material, and when used less than 0.1 part by weight, color development is difficult, and when it exceeds 20 parts by weight, the strength is not good.

In addition, the present invention may further add waste tire powder or pulverized waste glass powder or glass beads pulverized to 0.01 to 0.3 mm. Adding waste tire powder increases the durability of the vehicle's load, has a shock absorbing effect, prevents freezing, and prevents slipping. In addition, when the waste glass powder or glass bead is added, it is preferable to make a visually beautiful packaging due to the light reflection effect. Since the size is used for thin layer packaging, it is preferable to grind to 0.01 ~ 0.3mm in consideration of the thickness of the packaging.

In the present invention, additives such as thickeners, film-forming agents, leveling agents, plasticizers, cryoprotectants, pH adjusters, preservatives, anti-fog agents, antibacterial agents, dispersants, antifoaming agents, sunscreen agents, antioxidants, and the like may be further used. The content of is not limited because it is preferable to have appropriate physical properties according to the experiment.

The present invention may be given a strength and color of the surface by coating a thin layer on the road surface of the asphalt by the conventional method, by spraying the finish or asphalt oil paint for coating using the composition.

Hereinafter, one preferred embodiment of the present invention will be described in detail, but the present invention is not limited to the following examples.

Example 1

Asphalt to 100 parts by weight of a mixture of 70% by weight of coarse aggregate (gravel) of KS F 2357, 22% by weight of fine aggregate (sand) of KS F 2357, and 8% by weight of filler (stone) of KS F 3501 20 parts by weight, 5 parts by weight of ethylene vinyl acetate having a number average molecular weight of 30,000, 5 parts by weight of cellulose fibers, and 1 part by weight of HI-MILAN (manufactured by Mitsui Dupont Polychemistry) were mixed with ionomers.

The composition thus prepared was heated to 150 ° C., stirred with a mixer, laid in a thickness of 2 cm, and then compacted using a combination.

By the same method as above, the specimen of the pavement paved with thin layers was measured for mechanical properties.

Example 2

Except for using an additional 2 parts by weight of the curing agent in the composition of Example 1 was the same.

The curing agent is 65% by weight of styrene butadiene rubber latex having a solid content of 60%, 10% by weight of mineral spirit oil (mineral oil), 15% by weight of polyoxyethylene stearyl ether, 5% by weight of 2-methylglyconate, liquid sodium silicate 5% by weight was used in mixture.

Example 3

Using the composition of Example 1, the grounded compacted layer was dried and then dried by coating a red polyurethane two-component coating.

<Dynamic stability measurement>

Dynamic stability was measured by applying a force of ground pressure of 6.4kg / cm2 to the specimen of 300mm × 300mm × 50mm at 60 ℃ according to the Wheel Tracking Test method and measuring the number of round trips per turn depth (times / mm).

As a result, the dynamic stability (60 ℃) was 5000 times / mm or more, more than twice the value of the conventional thin packaging, and even though the thickness of the surface layer was 2cm, it was confirmed that the thin layer packaging was possible. .

<Repeat Banding Fatigue Test>

The effect of crack suppression of road reinforcement sheet by repeated bending fatigue test was measured, and the bending test piece was manufactured in 50mm × 50mm × 400mm according to the 'bending test' of the pavement test method manual, and the constant temperature furnace of the tester was 5 ℃, It maintained at 20 degreeC, the load control was given to the 3rd point load by the load load speed of 5 Hz, and the number of loads up to a fixed amount (2 mm, 3 mm, 5 mm) was investigated. The load was 50% and 75% of the bending fracture strength of the asphalt mixture at 20 ° C.

As a result, the bending strength is 900 N / ㎠ or more, rupture distortion is 6 × 10 ^{- 3} or more, the displacement of up to fracture more than 3.9 mm, the breaking energy exhibits a superior property to at least 15.3 kN · nm can be seen that small cracks After one year of observing the road surface, it was confirmed that no crack occurred in the thin asphalt.

Indirect tensile strength

Indirect tensile strength is measured using a cylindrical specimen with a diameter of 100 mm at a strain rate of 50 mm per minute in the direction perpendicular to the cross section to measure the final horizontal strain value at break, the maximum load at this time, and the strain value and the maximum load. Indirect tensile strength was obtained by the conventional method using the load. Indirect tensile strength indicates that the higher the value, the higher the maximum load and the smaller the deformation value.

As a result, it was found that the indirect tensile strength (25 ° C.) was excellent at 1500 kPa or more.

In addition, it was possible to give a color to the thin pavement by coating the paint for asphalt as in Example 3, it was found that after one year, discoloration hardly occurred. In addition, when used in addition to the curing agent as in Example 2, the curing time of the composition was shortened, it did not affect other mechanical properties.

When the thin layer pavement using the composition according to the present invention, the adhesion to the asphalt road surface is excellent, the durability against cracks and wheel marks due to vehicle traffic, and the durability due to the temperature change according to the season is excellent It is possible to provide a composition for paving the asphalt thin layer with little damage.

In addition, since the time for repair and construction is shortened, it is possible to provide a composition for thin asphalt pavement with less damage to road traffic.

In addition, the present invention can adjust the curing time by appropriately using a curing agent according to the season or temperature, there is an effect that can add the braking force or visibility by adding waste tire powder or waste glass powder.

In addition, the present invention is to coat the surface finish or asphalt oil paint to improve the surface strength and durability, not only to increase the bonding strength between the composition, but also easy to use a variety of colors, can be used in a variety of colors, only the thin layer is reduced cost It is possible to provide an economical thin packaging method.

Claims (12)

10 to 40 parts by weight of asphalt, 65 to 80% by weight of coarse aggregates, 10 to 30% by weight of fine aggregates, and 5 to 10% by weight of fillers, selected from 10 to 40 parts by weight of asphalt, an ethylene copolymer or a styrene copolymer 1 to 10 parts by weight of any one or more polymer modifiers, 1 to 15 parts by weight of any one or more strength modifiers selected from polypropylene fibers, polyethylene fibers, cellulose fibers, glass fibers, carbon fibers, and aramid fibers, and air of ethylene and methacrylic acid. Asphalt thin layer pavement composition, characterized in that used by mixing 0.5 to 2 parts by weight of ionomer containing 1 to trivalent metal salt in itself. The method of claim 1, The polymer modifier is any one of an ethylene copolymer selected from ethylene vinyl acetate, ethylene ethyl acrylate, ethylene methyl acrylate and ethylene-propylene copolymer having a number average molecular weight of 1,500 to 90,000, or a powder type having a number average molecular weight of 2,000 to 900,000. A styrene-butadiene-styrene copolymer, a styrene-butadiene-rubber copolymer, a styrene-based copolymer selected from acrylonitrile-styrene-acrylic acid ester, characterized in that the composition for paving thin asphalt. The method of claim 1, Aromatic petroleum resin, coumarone indene resin, aliphatic petroleum resin, phenol resin, rosin, hydrogenated rosin, modified rosin, coumarone-indene resin, shellac, copal, fatty acid, polyamide resin, Asphalt thin layer pavement composition, characterized in that to use at least one selected from the group consisting of polyester resin further by 0.1 to 3 parts by weight. The method of claim 3, wherein 40 to 70% by weight of any one or more high-concentration rubber latex selected from styrene butadiene rubber-based, acrylic rubber-based, ethylene-vinyl acetate-based, and chloroprene-based resins having a solid content of 40-70% in the composition, mineral oil, animal or plant, or synthetic oil Any one or more ratios selected from 5 to 20% by weight of any one or more heavy oils, polyoxy ethylene nonylphenyl ether, polyoxyethylene olyl phenyl ether, polyoxyethylene cetyl ether, polyoxy ethylene lauryl ether, polyoxy ethylene stearyl ether 10 to 30 wt% of ionic surfactant, 2 to 7 wt% of at least one ion blocking agent selected from 2-methyl calcium methacrylate, ethylenediamine tetraacetic acid, ammonium glyconate, sodium trifolate, casein Water-soluble silicate selected from%, liquid sodium silicate, liquid potassium silicate, liquid lithium silicate Asphalt thin layer pavement composition, characterized in that it is used by further adding a curing agent mixed with 2 to 5% by weight. The method of claim 4, wherein The hardening agent is a asphalt thin pavement composition, characterized in that 1 to 5 parts by weight based on 100 parts by weight of the aggregate and filler. The method of claim 1, Asphalt thin layer pavement composition, characterized in that further adding an inorganic pigment to the composition. The method of claim 1, Asphalt thin layer pavement composition, characterized in that it is eco-friendly by adding the waste tire powder or pulverized waste glass powder pulverized to 0.01 ~ 0.3 mm to the composition. Asphalt thin pavement using the composition of any one of claims 1 to 7. 1) compacting after laying the asphalt substrate; 2) compacting after heating and laying the composition for thin layer packaging of any one selected from claim 1 to the top of the asphalt layer; 3) drying after curing; Laminated paving method of asphalt characterized in that it has a. The method of claim 9, 4) after the step 3) after the coating of the finish or asphalt oil paint for curing; Laminated paving method of asphalt characterized in that it further adds. The method of claim 10, The finishing material is asphalt thin pavement method, characterized in that any one selected from epoxy resin, urethane resin, acrylic resin, latex. The method of claim 9, The thin layer paving method of asphalt, characterized in that the thickness of the surface layer using the thin layer composition is 0.1 ~ 2 cm.